engine MERCEDES-BENZ C CLASS COUPE 2004 Owners Manual

314 Practical hintsTowing the vehicle!
To be certain to avoid a possibility of
damage to the transmission, however,
we recommend the drive shaft be dis-
connected at the rear axle drive flange
for any towing beyond a short tow to a
nearby garage.
Warning!
G
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:

the engine will not run


there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
as that will be necessary to adequately con-
trol the towed vehicle.
Prior to towing the vehicle with all wheels on
the ground, make certain that the SmartKey
is in starter switch position 2.
If the SmartKey is left in starter switch
position 0 for an extended period of time, it
can no longer be turned in the switch. In this
case, the steering is locked. To unlock, re-
move SmartKey from starter switch and re-
insert.
iTo signal turns while being towed with
the hazard warning flasher in use, turn
SmartKey in starter switch to
position 2 and activate the combina-
tion switch for the left or right turn sig-
nal in the usual manner – only the
selected turn signal will operate.
Upon canceling the turn signal, the
hazard warning flasher will operate
again.

315
Practical hints
Towing the vehicle
Warning!
G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.
!When towing the vehicle with all wheels
on the ground, please note the follow-
ing:
With the automatic central locking acti-
vated and the SmartKey in starter
switch position
2, the vehicle doors
lock if the left front wheel as well as the
right rear wheel are turning at vehicle
speeds of approx. 9 mph (15 km/h) or
more.
Switch off the tow-away alarm
(page 79).
To prevent the vehicle doors from lock-
ing, deactivate the automatic central
locking (
page 129).
Towing of the vehicle should only be
done using the properly installed tow-
ing eye bolt. Never attach tow cable,
tow rope or tow rod to vehicle chassis,
frame or suspension parts.
iIf the battery is disconnected or dis-
charged

the SmartKey will not turn in the
starter switch. See notes on the
battery (
page 307) or on jump
starting (page 310).


the gear selector lever will remain
locked in position P. See notes on
manual unlocking of gear selector
lever (
page 291).

317
Practical hintsFuses
 Fuses
Fuse box in passenger compartment Opening

Pry cover
1 open with a screw driver
or similar tool.

Remove cover rearward.
Closing

Attach the cover in the front.

Fold the cover in until it engages.
Fuse chart
The fuse chart is found in the fuse box in
the passenger compartment. The amper-
ages of the fuses are also given there.
Fuse box in engine compartment
The fuse box is located in the engine com-
partment on the left-hand side.
1 Cover
2 Screw
3 Retainer
iOnly install fuses that have been tested
and approved by Mercedes-Benz and
that have the specified amperage rat-
ing.
Never attempt to repair or bridge a
blown fuse. Have the cause determined
and remedied by an authorized
Mercedes-Benz Center.

319
Technical data
Spare parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive Engine
Rims and Tires
Electrical system
Main Dimensions Weights
Fuels, coolants, lubricants, etc.
Consumer information

322 Technical dataIdentification labels
Identification labels1 Certification label 2Vehicle Identification Number (VIN) 3Information label, California version
Vacuum line routing for emission con-
trol system
4 Engine number (engraved on engine)
5 VIN, visible (lower edge of windshield)
6 Emission control label
When ordering spare parts, please specify
vehicle identification and engine numbers.

324 Technical dataEngine
EngineModel
C 230 Kompressor (203.740)
1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all sp ecial bodies and special equipment.
C 320 (203.764)
1
Engine
271
112
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
4
6
Bore
3.23 in (82.00 mm)
3.54 in (89.90 mm)
Stroke
3.35 in (85.00 mm)
3.3 in (84.00 mm)
Total piston displacement
109.6 cu in (1796 cm
3)
195.2 cu in (3199 cm
3)
Compression ratio
8.5:1
10:1
Output acc. to SAE J 1349
189 hp / 5800 rpm
(141 kW / 5800 rpm)
215 hp / 5700 rpm
(160 kW / 5700 rpm)
Maximum torque acc. to SAE J 1349
192 lb-ft / 3500 rpm
(260 Nm / 3500 rpm)
229 lb-ft / 3000 rpm
(310 Nm / 3000 rpm)
Maximum engine speed
6000 rpm
6000 rpm
Firing order
1-3-4-2
1-4-3-6-2-5
Poly-V-belt
2420 mm
2380 mm

330 Technical dataFuels, coolants, lubricants, etc.
Fuels, coolants, lubricants, etc.Capacities Vehicle components and their respective
lubricants must match. Therefore use only
brands tested and approved by Mercedes-Benz. Please refer to the Facto-
ry Approved Service Products pamphlet, or
inquire at your Mercedes-Benz Center.
Model
Capacity
Fuels, coolants, lubricants, etc.
Engine with oil filter
C230Kompressor
C320
5.8 US qt (5.5 l)
7.9 US qt (7.5 l)
approved engine oils
Automatic transmission
8.5 US qt (8.0 l)
MB Automatic Transmission Oil
Manual transmission
1.3 US qt (1.2 l)
MB Manual Transmission Oil
Rear axle
1.2 US qt (1.1 l)
Hypoid gear oil SAE 85 W 90
Power steering
approx. 1.1 US qt (1.0 l)
MB Power Steering Fluid (Pentosin CHF 11S)
Front wheel hubs
approx. 2.1 oz (60 g) each
High temperature roller bearing grease
Cooling system
C230Kompressor
C320
approx. 5.9 US qt (5.6 l)
approx. 6.8 US qt (6.4 l)
MB 325.0 Anticorrosion/Antifreeze Agent

332 Technical dataFuels, coolants, lubricants, etc.Engine oils
Engine oils are specifically tested for their
suitability in our engines. Therefore, use
only engine oils approved by
Mercedes-Benz. Information on approved
products is available in the Factory Ap-
proved Service Products pamphlet, or at
your authorized Mercedes-Benz Center.Please follow FSS recommendations for
scheduled oil changes. Failure to do so
could result in engine damage not covered
by the Mercedes-Benz Limited Warranty.
Engine oil additives
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by
the Mercedes-Benz Limited Warranty.Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil is used in the air condition-
ing system.Never use R-12 (CFC) or mineral-based lu-
bricating oil. Otherwise damage to the
system will occur.
Brake fluid
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
the atmosphere. Under extremely strenu-
ous operating conditions, this moisture
content can lead to the formation of bub-
bles in the system, thus reducing the sys-
tem’s efficiency.
Therefore, the brake fluid must be re-
placed every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. Your au-
thorized Mercedes-Benz Center will pro-
vide you with additional information.
!Always check the oil filler cap
(page 240) for important informa-
tion pertaining to the engine oil need-
ing to meet a specific Mercedes-Benz
specification (e.g. MB 229.5). If such
information is printed on the oil filler
cap, only use an engine oil from the list
of approved engine oils in the Factory
Approved Service Products pamphlet
that meets the specification indicated
on the oil filler cap.
!Using engine oils of other specification
may cause the FSS to incorrectly deter-
mine the next service interval and will
result in engine damage not covered by
the Mercedes-Benz Limited Warranty.

333
Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasoline
Fuel requirements
Use only premium unleaded meeting
ASTM standard D 439:

The octane number (posted at the
p um p) m us t be 91 mi n. It i s an a vera ge
of both the Research (R) octane num-
ber and the Motor (M) octane number:
(R+M) / 2). This is also known as the
ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not exceed
10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains 10%
ethanol and 90% unleaded gasoline, can be
used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
!To maintain the engine’s durability and
performance, premium unleaded gaso-
l i n e m u s t b e u s e d . I f p r e m i u m u n l e a d e d
is not available and low octane fuel is
used, follow these precautions:

Have the fuel tank only partially
filled with unleaded regular and fill
up with premium unleaded as soon
as possible.


Avoid full throttle driving and abrupt
acceleration.


Do not exceed an engine speed of
3000 rpm if the vehicle is loaded
with a light load such as two per-
sons and no luggage.


Do not exceed
2/3 of maximum ac-
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain.
iFlexible Fuel Vehicles (identified by a
label reading Premium gasoline or
E85 only! on fuel filler flap) are de-
signed to operate on premium unlead-
ed gasoline or Ethanol fuel (E85), or any
mixture of these two.
See notes on Flexible Fuel Vehicles
(page 334).

334 Technical dataFuels, coolants, lubricants, etc.Gasoline additives
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon depos-
its.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to en-
gine performance problems such as:

Warm-up hesitation


Unstable idle


Knocking/pinging


Misfire


Power loss
Do not blend any specific fuel additives
with fuel. This only results in unnecessary
cost and may be harmful to engine opera-
tion. Damage or malfunctions resulting from
poor fuel quality or from blending specific
fuel additives are not covered by the
Mercedes-Benz Limited Warranty.
Flexible Fuel Vehicles
Flexible Fuel Vehicles are identified by a la-
bel reading Premium gasoline or E85
only!
on fuel filler flap).
These vehicles are designed to operate on
premium unleaded gasoline or Ethanol fuel
(E85), or on any mixture of these two.
Ethanol fuel (E85) is a mixture of approxi-
mately 85% Ethanol and 15% unleaded gas-
oline. Switching fuels
For best performance and driveability it is
recommended to use either one or the oth-
er fuel. A refueling pattern that alternates
between the two different fuels should be
avoided if possible.
Warning!
G
Ethanol fuel (E85) and its fumes are highly
flammable, poisonous and burn easily. Etha-
nol fuel can cause serious injuries if ignited
or if you come into contact with it or inhale
fumes of it. Avoid inhalation of Ethanol
fumes and skin contact with Ethanol. Extin-
guish all open flames before fueling. Never
smoke or create sparks close to Ethanol.